Hydraulic governor



Sept. 11, 1951 H. ALFARO HYDRAULIC GOVERNOR Filed March 5, 1946 HEEACLIOALF'AEO INVENTOR. fi

ATTORNEY Patentecl Sept. 11, 195 1 HYDRAULIC GOVERNOR Heraclio Alfaro,Springfield, Mass., assignor to American Bosch Corporation,

Springfield,

Mass., a corporation of New York Application March 5, 1946, Serial No.652,137

1 Claim.

This invention relates to hydraulic governors for internal combustionengines and has particular reference to a new and improved hydraulicgovernor adapted to be operated by oil from the engine oil supply andwhich is relatively simple and economical in construction yet efflcientin operation.

An object of the invention is to provide a new and improved hydraulictype governor which is relatively simple and economical in constructionyet efiicient in operation.

Another object of the invention is to provide a new and improvedhydraulic type governor of the type set forth which is adapted to beoperated by the oil supply of an internal combustion engine.

Another object of the invention is to provide a new and improved controlmeans for a hydraulic governor of the type set forth.

Other objects and advantages of the invention will be apparent from thefollowing description taken in connection with the acompanying drawing.It will be understood that many changes may be made in the details ofconstruction and arrangement of parts without departing from the spiritof the invention as expressed in the accompanying claim, and, therefore,the preferred form of the invention has been shown by way ofillustration only.

Referring to the drawing:

Fig. 1 is a sectional view of a governor constructed according to theinvention;

Fig. 2 is a sectional view taken on line 2-2 of Fig. 1 looking in thedirection of the arrows; and

Fig. 3 is a fragmentary, sectional view taken on line 3-3 of Fig. 1looking in the direction of the arrows.

Referring more particularly to the drawing, wherein similar referencecharacters designate corresponding parts throughout the several views,the hydraulic governor shown embodying the invention comprises asupporting frame having a limb or flange H' through which extends theshaft l2 which is supported thereby and which is connected to theself-aligning drive shaft l3 which has one end I splined for connectionwith the drive shaft of the engine and having at its opposite end aspline construction arranged to permit smooth axial sliding by means ofthe four balls l6 held in the cross-like cage i! which is retainedbetween the end l of the shaft I3 and the adjacent end of the shafts I2.

On the shaft I2 is provided the spinner 5 which is adapted to rotate atcam shaft speed upon rotation of the shafts l3 and which spinner I8 isadapted to slide axially in the chamber 19,

acting as a detector. The spinner [8 has the marginal flanges 20 and 2|.

In the frame or support [0 are provided the pressure inlet ports orlines 22 and 23 which provide fluid for operating the servomotor anddetector valve. The line 22 is connected to the oil supply of the engineon which the governor is employed and is adapted to be aligned witheither of the grooves 23a or 24 in the circumference of the shaft 12.

The line 23 is connected to the servomotor cylinder 25 and is likewiseconnected to groove 26 adapted to be aligned with either of the grooves2311 or 24 in the shaft 12.

In the frame or support [0 there is also provided a low pressure sump 21adapted to contain oil at atmospheric pressure and which has an outlet28, and which is connected to the pressure inlet line 22 through thelines 29 and 30 to retain the low pressure sump 21 filled with oil. Inthese lines is a restriction 29a.

The servomotor cylinder 25 is connected to the low pressure sump 27 bythe opening 3|.

On the frame or support l0 adjacent the periphery of the spinner I8 isprovided the impact tube 32 which is provided for the purpose ofincreasing the dynamic pressure created dynamically by the rotation orspinning of the spinner l8. This impact tube 32 is connected by thelines 33 and 34 with the chamber I9. If desired, the flange 20 on thespinner l8 may be omitted in which event the impact tube 32 could alsobe omitted.

The controls or control levers provided may be arranged to suit theparticular engine on which the device is employed, and include a manualspeed setting or control lever 35, the actuator lever 36 and theservomotor compensating lever 31. The compensating lever 31 is pivotallyconnected at one end to the lever or rod 38, which, in the case of aDiesel engine, is connected to the injection pump capacity control, orin other engines is connected to the throttle.

The lever 35 is pivotally mounted at 39 to the bracket 46 which isadjustably mounted on the frame or support [0 such as by a serratedadjustment ll as shown in Fig. 1 of the drawing.

The lever 35 is connected to the lever 31 by suitable means as by thepin 42 and slot 43 as shown and is thus adapted to actuate thecompensating lever 37 which, in turn, adjusts the spinner l8 through therod 44 connected to the lever 31 and the coil spring 45 which isinterposed between the rod 4 3 and the spinner l8, and urges the spinneraway from the rod 44 and also adjusts the rod 44 according to movementof the spinner IS. The lever 35 is also adjusted by the servomotorpiston 46 through the rod 41 which is also connected to the compensatinglever 31, and simultaneously the rod 38 is adjusted to adjust theinjection pump capacity control in the case of a Diesel engine or thethrottle in the case of other engines. As shown, the levers may beexposed and can be covered by a sheet metal stamping, or else three oilseals for the rods should be provided.

As shown, the coil spring 25a in the servomotor cylinder 25 engages theservomotor piston and normally urges it toward the end of the line 23.

The servomotor is of the single acting type having a spring 25a thatwill cut off the fuel delivery in case the hydraulic system should fail.

The compensating lever 31 also functions as a presetting device, thatis, the controls may be adjusted manually toward the desired speed, andthe servomotor readjusts the controls to the exact setting required.

In the operation of the governor when the shaft [2 is moved to the'left,in which direction it is normall urged by the coil spring 45, thepressure inlet line 22 and the line 23 are connected through thecircumferential groove 2% on the shaft l2 and the oil is fed to theservomotor and pushes back the servomotor piston 46 against the actionof the spring 25a and through the piston rod 4'! which is actuated bymovement of the piston 26, causes movement of the compensating lever 31which automatically adjusts the lever 38 to increase the amount of fuelsupplied to the motor. This continues until the speed of rotation of theshaft [2 and spinner I8 is such that the flow of oil flowing through theports Q8 in the spinner i8 and passing through the impact tube 32 andline 33 is of such force as to move the spinner 18 against the force ofthe coil spring 45 and through the rod &4 adjust the lever 31 and rod 38to'cut down the supply of fuel to the motor which reduces the speed ofthe shaft [2. When the shaft 12 and spinner [8 have moved a, sufiicientdistance against the action of the spring 45, the circumferential groove23a on the shaft I 2 is aligned with the pressure inlet line 23 and theoil passes through the opening 49 in the shaft I2 to the low pressuresump 2'! from which it flows through the outlet 28 to the circulatingsystem.

As pointed out above, the rim or edge 20 on the spinner could be removedand such removal might even facilitate the axial movement of thespinner.

It is pointed out that with the construction of this invention the oilsupply pressure may vary within a, wide range without necessarilaffectin its operation. Also, the spring rate of the servomotor springneed not be precise.

It i particularly pointed out that with the present construction theactual movement of the spinner against the action of the spring iseffected by fluid pressure created by the rotation of the spinneritself.

From the above it will be seen that I have provided simple, efiicientand economical means for obtaining all of the objects and advantages ofthe invention.

Having described my invention, I claim:

, In a. hydraulic governor, a bore, a shaft in said bore and adapted tobe rotated by the engine with which the governor is employed, a spinneron said shaft, said spinner having radial fluid passage means, a leverfor controlling the supply of fuel to the engine, a fluid inlet lineconnected to said bore, an impact tube tangential to said radial fluidpassage means for increasing the pressure of fluid received from saidradial fluid passage means whereby pressure of fluid from said radialpassage means will actuate said spinner and shaft in a direction alongthe axis of said shaft and means connected to said control lever andresiliently urging said spinner against the action of fluid from saidradial passage means, a compensating lever connected to said lever forcontrolling the supply of fuel to the engin and a servomotor operativelconnected to said compensating lever, a fluid passageway connecting saidbore and servomotor, said servomotor being actuated by fluid from saidpressure inlet line and adapted to automatically control saidcompensating lever and thereby adjust the supply of fuel to the engine,and a second control lever for manually presetting the supply of fuel tothe engine.

HERACLIO ALFARO.

ClES CITED The following references are of record in the file of thispatent:

UNITED STATES PATENTS Number Name Date 794,898 Stumpf July 18, 19051,762,357 Schmidt June 10, 1930 1,986,415 Schmidt Jan. 1, 1935 2,247,989Cita July 1, 1941 2,378,558 Kalin June 19, 1945 FOREIGN PATENTS NumberCountry Date 262,172 Great Britain Nov. 29, 1926

